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马水桔被锈蜘蛛危害后出现黑斑怎么办?

dg真人游戏faburiqi: 2017-05-13 16:08

问:
dg真人游戏现在的马水桔部份被锈蜘蛛危害后,出现黑斑,有一层油膜似的,现在有什么方法去掉?或用什么农药喷射去掉?

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